Deselect objects that do not have UVMap?
obj.data.uv_textures is a list of uvmaps. Each item in the list has a name property that you can test -

import bpy

for obj in bpy.context.selected_objects:
    uvt = obj.data.uv_textures
    for m in uvt:
        if m.name == "UVMap":
            obj.data.uv_textures.remove(m)